@Override public void run(Transaction tx, Key userKey, Void arg) { Entity user = tx.get(userKey); if (user == null) { System.out.println("Nothing to delete, user does not exist."); return; } Query<Key> query = Query.newKeyQueryBuilder() .setNamespace(NAMESPACE) .setKind(COMMENT_KIND) .setFilter(PropertyFilter.hasAncestor(userKey)) .build(); QueryResults<Key> comments = tx.run(query); int count = 0; while (comments.hasNext()) { tx.delete(comments.next()); count++; } tx.delete(userKey); System.out.printf("Deleting user '%s' and %d comment[s].%n", userKey.getName(), count); }
/** * Finds the ID of the first {@link PortabilityJob} in state {@code jobState} in Datastore, or * null if none found. * * <p>TODO(rtannenbaum): Order by creation time so we can process jobs in a FIFO manner. Trying * to OrderBy.asc("created") currently fails because we don't yet have an index set up. */ @Override public UUID findFirst(JobAuthorization.State jobState) { Query<Key> query = Query.newKeyQueryBuilder() .setKind(KIND) .setFilter(PropertyFilter.eq(PortabilityJob.AUTHORIZATION_STATE, jobState.name())) // .setOrderBy(OrderBy.asc("created")) .setLimit(1) .build(); QueryResults<Key> results = datastore.run(query); if (!results.hasNext()) { return null; } Key key = results.next(); return UUID.fromString(key.getName()); }
.setNamespace(NAMESPACE) .setFilter(PropertyFilter.hasAncestor(ROOT_KEY)) .setKind(KIND1) .build(); Iterator<Key> keyOnlyResults = getStronglyConsistentResults(scKeyOnlyQuery, keyOnlyQuery);
.setKind(_model.getKind()) .setFilter(PropertyFilter.eq(_model.getId(), s)) .build();
private Key[] findAllKeys(Class entityClass) { Iterable<Key> keysFound = queryKeys(Query.newKeyQueryBuilder().setKind( this.datastoreMappingContext .getPersistentEntity(entityClass).kindName()) .build()); return StreamSupport.stream(keysFound.spliterator(), false).toArray(Key[]::new); }
private Key[] findAllKeys(Class entityClass) { Iterable<Key> keysFound = queryKeys(Query.newKeyQueryBuilder().setKind( this.datastoreMappingContext .getPersistentEntity(entityClass).kindName()) .build()); return StreamSupport.stream(keysFound.spliterator(), false).toArray(Key[]::new); }
assertFalse(results1.hasNext()); Query<Key> keyOnlyQuery = Query.newKeyQueryBuilder().setKind(KIND1).build(); QueryResults<Key> results2 = datastore.run(keyOnlyQuery); assertTrue(results2.hasNext());
/** Example of creating and running a key query. */ // [TARGET newKeyQueryBuilder()] // [VARIABLE "my_kind"] public QueryResults<Key> newKeyQuery(String kind) { // [START newKeyQuery] Query<Key> query = Query.newKeyQueryBuilder().setKind(kind).build(); QueryResults<Key> results = datastore.run(query); // Use results // [END newKeyQuery] return results; }